Always saw my foster mom in bathroom.She was 55,had a nice full figure and always wore corsets which aroused me.I was 17 when frustration took over, so wearing only shorts i approached her from behind at sink.I asked to massage her shoulders on a pretence.Looking over her shoulder she said of course son you know its ok to be excited.She was only wearing her corset which came to the base of her spine so i saw her bottom.Immediately i slipped off my shorts and pressed against her.There was nothing only silence but she parted her buttocks slightly and i slipped up inside her.She just gasped and said isnt that nice now.Overjoyed we started to relieve our frustration with me bouncing off her with every slap.We slept together for years and it was our business.